In the 1990s, the Korean government recognized the pressing needs to reduce MSW at the source and foster the recycling of reusable materials as it becomes increasingly difficult to secure or procure properties to dump MSW or build facilities to dispose of it properly. It was mainly due to the prevalent Not-In-My-Back-Yard (NIMBY) syndrome and the stiff increase in land values. The volume-based waste fee system (unit pricing system) has been finally implemented in 1995 along with the previous establish- ments of related policies in order to alleviate the environmental impact and conditions that the issue of MSW brought about .